ML20091E010: Difference between revisions

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#REDIRECT [[BECO-92-043, Requests Permission for 3 Gallons Per Min of Scrubber Effluent from Gas Generator Scrubber to Be Dicharged Through PNPS Discharge Canal Storm Drain]]
| number = ML20091E010
| issue date = 04/03/1992
| title = Requests Permission for 3 Gallons Per Min of Scrubber Effluent from Gas Generator Scrubber to Be Dicharged Through PNPS Discharge Canal Storm Drain
| author name = Anderson R
| author affiliation = BOSTON EDISON CO.
| addressee name = Landry T
| addressee affiliation = ENVIRONMENTAL PROTECTION AGENCY
| docket = 05000263
| license number =
| contact person =
| document report number = BECO-92-043, BECO-92-43, NUDOCS 9204130275
| document type = CORRESPONDENCE-LETTERS, EXTERNAL CORRESPONDENCE
| page count = 2
}}
 
=Text=
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00STON EDISON IQ m % a h>mFtim h i, Hm hwt j'g'f. ift t i.i a rm ti g 3 g f f (; (1/ 3f O I
R::y A. Anderson Senior Vo hesdent - Nsuer
[gh        2 Hr. T. E. Landry                                                                                  l U. S. Environmental Protection Agency                                                            i Haste Hater Compilanc.e Section                                                                  '
JFK federal Building, Room 2113 HHH Boston, MA 02203
 
==Dear Hr. Landry:==
 
The Boston Edison Company will be operating a permanent hydrogen injection system at the Pilgrim Nuclear Power Station (PNPS). The purpose of the hydrogen injection system is to inject hydrogen into the reactor coolant, via the feedwater system, to reduce the dissolved oxygen concentration. Reducing the dissolved c,xygen concentration and maintaining cigh purity in the reactor coolant should reduce the susceptibility of reactor piping and materials to intergranular stress corrosion cracking. This process is referred to as Hydrogen Water Chemistry (HHC). The hydrogen injection system utilizes electrolytic generation of hydrogen and oxygen onsite.
Boston Edison requests permission for 3 gallons per minute of scrubber effluent from the Gas Generator Scrubber, associated with the hydrogen injection system, r to be dischaiged through the PHPS discharge canal storm drain, NPDES Permit Discharge Point #005. In addition, there will be a weekly discharge of approximately 200 gallons of scrubber washoown water. The discharge flow of the washdown water, when combined w!th scrubber effluent, will not exceed 10 gallons per minute. There will be a concentration of approximately 60 ppm (parts per million) of potassium hydroxide (KOH) in the discharge effluent.
The KOM will increase the pH of this discharge (which consists of source demineralized water plus a trace of KOH) to 10.9 standard units. Prior to entering Cape Cod Bay waters, the dilution from the flow of at least one circulating water pump (155,000 gpm) will render the concentration of KOH to 0.001 ppm (0.004 ppm when discharging the washdown water) and the pH will be comparable to background levels. Therefore, this discharge is expected to have no adverse impact on the marine environment. Discharge of this effluent will be continuous for the life of PNPS beginning in the fall of 1992.
Please confirm whether the approval of this request will require modification of the existing NPDES Permit #HA0003557. He would appreciate a response to this request by Hay 1, 1992.
If additional information is required please contact Mr. R. D. Anderson at 617-849-8935.
My tmly yours, 9204130275 920403 ADDCK 0D000263 PDR P                  PDR                                                      4N9j o et b ' t y RDA/ cab /6849 cc: See next page L A. Andermn    g 10
 
e 00STON EDISON C0HPANY Mt. T. E. Landry Page 2 cc:      U. S. Nuclear Regulatory Comission /                                                                                                                  '!
Document Control Desk                                                                                                                                    '
Washington, D. C. 20555 U. S. Nuclear Regulatory Comission Regicn I 475 Allendale Road                                                                                                                                    ,
King of Prussia PA 19406                                                                                                                              i Hs. Cynthia Kane Massachusetts Division of Hater Pollution Control Permit Section - 7th Floor One Hinter Street Boston, MA 02198                                                                                                                                      :
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